Odostomia rotundata

Last updated

Odostomia rotundata
Odostomia rotundata 001.png
Apertural view of a shell of Odostomia rotundata
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Heterobranchia
Family: Pyramidellidae
Genus: Odostomia
Species:
O. rotundata
Binomial name
Odostomia rotundata
(Carpenter, 1856) [1]
Synonyms
  • Chrysallida rotundata Carpenter, 1856 (basionym)
  • Odostomia (Chrysallida) rotundata (Carpenter, 1856)

Odostomia rotundata is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies. [2] [3]

Contents

Description

The shell has an ovate shape. Its length measures 2.3 mm. The 2 ½ whorls of the protoconch form a depressed helicoid spire whose axis is at right angles to that of the succeeding turns. The four whorls of the teleoconch are well rounded, moderately contracted at the sutures, and very slightly shouldered at the summit. They are marked by five strong spiral keels on all the whorls between the sutures, excepting the first which has four and obsolete axial ribs on the first two. These axial ribs are best expressed near the summit of the whorls, scarcely reaching the suture, and rendering the spiral cords feebly tuberculate. On the body whorl the axial sculpture is reduced to numerous raised axial threads, like those between the cords on the base. The sutures are poorly defined. The base of the body whorl is well rounded. It is marked by six spiral cords of which the two anterior ones are a little weaker than the rest; separated by spaces which are a little narrower than the cords and crossed by numerous fine axial threads. The aperture is pyriform. The posterior angle is acute. The outer lip is thin, showing the external sculpture within. The columella is stout, curved, and provided with a weak fold at its insertion. The parietal wall is covered with a thin callus. [4]

Distribution

The type specimen was found in the Pacific Ocean off Mazatlán, Mexico.

Related Research Articles

<i>Odostomia clementina</i> Species of gastropod

Odostomia clementina is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Besla convexa</i> Species of gastropod

Besla convexa is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia effusa</i> Species of gastropod

Odostomia effusa is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia excelsa</i> Species of gastropod

Odostomia excelsa is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia fasciata</i> Species of gastropod

Odostomia fasciata is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia hipolitensis</i> Species of gastropod

Odostomia hipolitensis is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia nodosa</i> Species of gastropod

Odostomia nodosa is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia ovata</i> Species of gastropod

Odostomia ovata is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia photis</i> Species of gastropod

Odostomia photis is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia reigeni</i> Species of gastropod

Odostomia reigeni is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia oonisca</i> Species of gastropod

Odostomia oonisca is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia telescopium</i> Species of gastropod

Odostomia telescopium is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia lucca</i> Species of gastropod

Odostomia lucca is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia pulcia</i> Species of gastropod

Odostomia pulcia is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia pulcherrima</i> Species of gastropod

Odostomia pulcherrima is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia sapia</i> Species of gastropod

Odostomia sapia is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Ividella quinquecincta</i> Species of gastropod

Ividella quinquecincta is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia torrita</i> Species of gastropod

Odostomia torrita is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia trachis</i> Species of gastropod

Odostomia trachis is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

<i>Odostomia virginalis</i> Species of mollusc

Odostomia virginalis is a species of sea snail, a marine gastropod mollusc in the family Pyramidellidae, the pyrams and their allies.

References

  1. ↑ Carpenter, Cat. Mazatlan shells, 1856, p. 418
  2. ↑ WoRMS (2011). Odostomia rotundata Carpenter, 1856. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575901 on 2011-11-10
  3. ↑ Keen M. (1971). Sea shells of Tropical West America. Marine mollusks from Baja California to Perú. (2nd edit.). Stanford University Press pp. 1064
  4. ↑ Dall & Bartsch, A Monograph of West American Pyramidellid Mollusks, United States National Museum Bulletin 68, p. 168; 1909
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.